Improvement in lever-powers



H. C. BELL Lever Power. "No.l68,60l. Patented0ct.11,187 5.v

HENEY o. BELL, or EDINA, MISSOURI.

IMPROVEMENT IN LEVER-POWERS.

Specification forming part of Letters Patent No. 168,60ll, dated Octoberl1, 1875; application led September4, 1875.

To all whom it may concern Be it known that I, HENRY C. BELL, of Edina,'Knox county, Missouri, have invented at new and Improved Lever-Power,ot' which the following is :t specification: l

The matin feature ot' my invention is e vibrating lever, provided withnotches or sockets, adapted for receiving the lin-ks of chains, which,in practice, pass around or otherwise connect with the. object to beraised. The lever is suspended and vihruted ou u. central pivot, so thatthe hoisting-chains are alternately slackened l.ind subjected to strain,each cha-in being shortened when slack, es hereinafter described.

Figure 1 is a. section-nl side elevation Fig. 2, a. top view ot' myimproved lever-power; Fig. 3, adetuil View.

A is the lever, which is suspended on :t pivot, B, by menus ot' :tchain, a, connected with any suitable support, I). C zuid D representthe hoisting-chains; and E, F, and Gr., notches or open slots to receivethe chainlinks, as shown. These notches are formed in the side wells ofrecesses` formed one on each side ot' the pivot B, and are ot' suchwidth as adapts them to ltdmit links of the chains G D, but will notpermit the joints of the links to pass through. VSeid notches :rrewidened at the bottom to permit the vibration of the lever withoutcrowding the chains.

Notches E F are for the links of different shape, and notches G are for:t longer purchase. In other Words, for. lifting heavy weights, Irequire a short purchase, and hence place the chain-links in notches Eor F. Light weights may be raised with greater rapidity by placing thechain-links in notches Sr, since such notches vibra-te through atgreater nrc than notches E or F. When one ot' the hoisting-chains isslack, say chain D, as shown in Fig. l, it u1u-y be detached from theslot and drawn up through the slot in leverA till it becomes taut, andztnother link is inserted in the notch and the lever depressed. Theother chain-say C-will then become sleek, and may be'simil-.trly drawntuut lind reedjusted in the same notch as before. This oper-ttion willbe continued until the shortening 0f chains C D has raised the object tothe desired height.

What l clztim islhe combination of lever A, having a. cheinlink notch ornotches on euch side oi' pivot B, zt suspending-chain, a, undhoisting-chains (l 1.), all as shown and described, to oper-ete asspecified.

. HENRY C. BELL. Witnesses:

F. W. GIEEORD, ARNOLD DAVIDSON.

